£46 LANGUAGE AND MENTAL DEVELOPMENT O$ CHILDREN education is to be seen in the capacity to talk and write about plain things like a house agent. Good teaching with older children will lead to a desire on their part to master the finer shades of difference between apparently synonymous words and phrases, 3. CONTINUOUS SPEECH The language used by children among themselves is the language they have found easiest and most serviceable for the expression of the thoughts and feelings habitual to them. The idiomatic phraseology of their family circle embodies in its own unique way the most vivid of their fundamental experiences. This idiomatic phraseology may not commend itself to the sophisticated purist, but it has, at least, the homely virtues of human warmth and sincerity. It is difficult, therefore, if not impossible, to get young children to>reclothe what they have most deeply felt or thought in some superior vesture recommended to them by a superior and educated elder. Children adopt the language of grown-ups in so far only as it chimes in harmoniously with their own needs. If their speech is unsatisfactory and needs to be improved they can be introduced to fresh fields of experience and helped to articulate what they think or feel about each novel impression as it arrives in terms of the language that alone can do justice to it. If we examine speech formally, certain patterns of phrase and sentence may be distinguished. Every child has a number of these patterns at the back of his mind* rekdy for use when he comes to speak or write. In Chapter III an attempt has been made to set out in genetic succession a few of the generally approved patterns of sentence-structure. Progress ^yill be seen to consist in a growing power to hold together in the mind more and more ideas of increasing complexity and to speak of them with due regard for their relationship to otie another. The mastery of a sentence-pattern reveals itself in the capacity to repeat it at will in different words. We cannot say that a pattern has been mastered until a child has made use of it on more than # single occasion. Many writers have assumed, however, that a child has the capacity to use a given pattern, say, a complex sentence, as soon as one appears in his conversation, though it may have been employed as a formula without any appreciation of its peculiar form. This error vitiates a great deal of the con- clusions so far drawn* as to the age at * which certain types of sentence can be managed by little children. Progress in speech also shows itself in a growing ability to tell a story with proper attention to the various time relationships